The 6W Questions about Customer Analysis are a way of defining the customer's needs and wants. It helps to understand what is being bought and why. The 6W Questions about Customer Analysis are: Who, What, When, Where, Why and How. Customer analysis is a crucial tool in marketing and sales. Without it, marketers can't understand the needs of their customers and how they can provide them with better products. The 6W questions are important in customer analysis because they help to understand how a customer feels about the product or service being offered.